Mechanical movement.



A. SGHUSTEK.

MECHANICAL MOVEMENT.

APPLICATION FILED JUNE 2a, 1911.

1,018,991. 4 Patented Feb.27, 1912.

wdrezv dkkwiii/ "UNITED STATES PATENT OFFICE.

ANDREW SCHUSTEK, OF GI-IICAGO, ILLINOIS.

MECHANICAL MOVEMENT.

To all whom it may concern:

Be it known that I, ANDRE\V SoHUsTnK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

The present invention relates to a mechanical movement in which a continuously rotating driving element imparts an intermittent partial rotative movement to a driven element, and is what is commonly termed a Geneva movement.

The objects of the present invention are, to arrange the parts so that the movements of the driven member will be positive and accurate; to arrange the parts so that the friction consequent to their operation will be reduced to practically a minimum degree; to arrange the parts so that there Wlll be practically no jar or vibration during their actuation, which would result in an undesir-able racket and an undesirable wear of the parts; to provide a gear-tooth connection between the parts, which will efiect. the major portion of the relative movement of the driven member; to arrange guide members for guiding the driven member just prior and subsequent to the engagement of the gear-tooth connection and move said member into and out of said engaging position; and to construct these guide members so that they will perform the initial and final port-ions of the relative movements of the driven member.

Further objects of the invention are, to eliminate any possibility of a binding occurring between the driving and driven members during the rotative movement of the driven member; to arrange the parts so as to present a mechanism of simple and solid construction, well adapted to withstand the wear of ordinary usage without affecting its efficiency of operation; and to arrange the parts so that any back lash or return movement of the driven member is prevented, and said member positively rotated in a given direction.

The invention further consists in the features of construction and the combination of parts hereinafter described and claimed.

In the drawings, Figure 1 is a face view of the mechanism of the present invention, showing the position between the driving and the driven member at the start of the Serial No. 635,342.

turning movement of the driven member;

Fig. 2, a view similar to Fig. 1, showing. the position assumed by the driven member when it has been rotated half way; Fig. 3, a view similar to Fig. 1, showing the position assumed by the driven member at the completion of its revolution; and Fig. 4:, a section on line 44 of Fig. 2, looking in the direction of the arrow.

The mechanical movement of the type embodied in the present invention, which is technically termed the Geneva movement, is one which is especially applicable and adapted, in conjunction with moving picture machines, to perform the film feeding operation. The mechanism of the present invention is especially adapted for this work, although it is not the intention to strictly limit the use of the invention to this particular class of work, but it is understood that it may be used in any other'connection where its use would be suitable and appropriate.

It is customary in these Geneva movements to arrange the driving and driven members so that upon each complete movement of the driving member a partial rotative movement will be given to the driven member. This, of course, results in the driven member being moved intermittently. The rotative movement imparted to the driven member is usually relatively quick, and after the rotative movement, there is usually some means provided for locking the driven member so as to eliminate any back lash, or reverse or vibratory movement, which might otherwise be imparted thereto.

The present invention, in the form illustrated in the drawings, comprises a disk 5, which is keyed, or otherwise secured, to a suitable driving shaft 6; and the disk 5 has a centrally disposed raised portion 7, which, for the purpose of description, may be termed a hub. The hub is depressed for a portion of its periphery. as at 8; and the lowest or central point of said depression is formed to provide what may be termed a socket 9, which forms, in effect, a gear-tooth. The faces of the depressed portion of the periphery of the hub are indicated in the drawings by the numerals 10 and 11, and, as will be seen from a study of Figs. 1, 2 and 3, are curved; and located above the depressed portion of the periphery of the hub is a plate 12, preferably removably secured thereto, which has its inner face curved, as at 13 and 14, to conform to the curve of the faces 10 and 11 of the depressed portion. These faces 10 and 11 cooperate with the curved surfaces 13 and 14 to provide curving channels or guideways leading to and from the socket or tooth 9.

The driven member 15 is composed of a series of peripheral concave surfaces 16, and intermediate these concave surfaces is a peripherally extending tooth 17. In the form shown in the drawings, there are four concave surfaces, and, hence, there will be four teeth. Mounted upon tliemember 15, and arranged in alinementwith the teeth 17, are a series of rollers 18. As will be seen from Fig. 1, the rollers lie upon the rear side of themember 15, and these rollers enter into the grooves or guideways 19 and 20 formed by the curved surface of the plate and the periphery of the hub. Each of the teeth 17 is adapted to enter the socket 9, and the teeth and socket constitute what, in fact, may be termed a gear-tooth connection between the driving and driven members.

The curve of the concave faces 16 is such that when the driving and driven members are in proper co-relation, said surface will ride upon the periphery of the hub 7, and, hence, durin this time the driven member will be locked, so that after the partial revvolution given it through the engagement of the teeth with the socket, a locking is effected, preventing any back lash, or other undesirable vibratory movement.

The operation will be understood from the foregoing, but briefiyis as follows: As the disk 5 is rotated, the hub 7 will be rotatedin correspondence therewith, bringing 7 one of the .guide channels leading from said depression on the periphery of the hub into position where itwill engage with one of the rollers 18. Then this engagement is first made, the parts are in the position shown in Fig. 1, where one of the rollers is about to enter the guide channel 19, and because of the curvilinear formation of said channel, the progress of the roller therethrough will result in a slight turning action being imparted to the driven member. The degree of movement thus imparted, however, will only be sufficient to bring one of the teeth 17 into position to enter the socket 9, and the turning action performed upon vthe driven member by the guide channels would,-in and of itself, not be suflicient to impart the entire degree of turning move ment to the driven member. The primary portion of the turning movement given to the driven member is performed by the en gagement effected between one of the teeth 17 and the socket 9. p The turning movement given to the driven member by the guide channels is only incidental and its chief function is in guiding.

By referring to the drawings, it will be noted that there is considerable clearance between the plate 12 and the periphery of the hub at the point where the socket 9 is located. This is provided because of the factthat the hub and the driven member are turning around axes which are located in different planes; and the circles described by the rotation of these two members will intersect. There must, therefore, be sulficient space provided to permit of a rotation of these two members without any binding or other undesirable action taking place.

By utilizing the tooth and socket connection for performing the turning operation, I am enabled to allow sufiicient space at the point where said turning takes place to eliminate any binding upon the rollers, and, at the same time, a firm engagement is always maintained between the driving and the driven members, so that the danger of back lash or the effect of a pressure tending to move the driven member in the opposite direction to that from which it is thrown by the driving member and the resultant vibratory movement of the driven member is eliminated. It is, of course, impossible to maintain the rollers in constant engagement between the walls of the channels, because of the fact that the driving and the driven members are rotating about different axial centers. And if some means, such as the gear-tooth connection between the driving and driven members, were not provided for, there would be a period when the roller would not be in cont-act with either wall of the guide channel, and, hence, the driven member could be pulled, if a strain were placed upon it, in a reverse direction from that intended. Such a movement is not only undesirable, but would frequently result in a binding of the driven and driving members; that is, the edge of the driving member would engage wit-h the top of the plate 12 and lock, and thus render the device inoperative.

After the turning movement which is performed by the gear-tooth connection has been completed, there will be a slight movement imparted to the driven member by the roller traveling out of the guide channels. The movement, however, as previously stated, imparted to the driven member by the guide channels is not suflicient to acc0n1- plish the complete rotative movement of the driven member, and practically all of the movement is accomplished through the instrumentalities of the gear-tooth connect-ion.

By the arrangement which I have provided, there is constantly maintained a firm engagement between the driving and driven members, so that the danger of back lash or reverse movement of the driven member is prevented, and, at the'same time, the parts are so arranged that the driven member can easily revolve Without any danger of a binding engagement being effected between it and any portion or portions of the driving member.

I claim:

1. In a device of the class described, the combination of a continuously rotating driving member having a socket therein, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, protruding members on the driven member, said driving member having grooves adjacent the socket adapted to receive said protruding members, said grooves and protruding members serving to guide the driven member during its movements to bring said teeth into and out of said socket, substantially as described.

2. In a device of the class described, the combination of a continuously rotating driving member provided With a hub portion having a socket therein, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, protruding members on the driven member, a separable plate on the driving member positioned above the hub portion and adjacent the socket, and cooperating With said hub portion to form grooves adapted to receive said protruding portions, said grooves and protruding portions serving to guide the driven member in its movements to bring the teeth into and out of the socket, substantially as described.

3. In a device of the class described, the combination of a continuously rotating driving member embodying a hub having a peripheral socket, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, and means for guiding the driven member to bring the teeth into and out of the socket, substantially as described.

4. In a device of the class described, the combination of a continuously rotating driving member embodying a hub portion having a peripheral depression, the central portion of the depression constituting a socket, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, a separable plate located above the depressed portion of the hub, said plate and hub cooperating to provide grooves lying upon opposite sides of said socket, and protruding members on the driven member adapted to enter said grooves to guide the driven member in its movements to bring the teeth into and out of the socket, substantially as described.

5. In a device of the class described, the combination of a continuously rotating driving member having a socket therein, an

* intermittently rotated driven member having a series of peripheral teeth adapted to successively enter said socket, said driving member being provided With curved grooves leading to and from the socket, and'rollers on the driven member adapted to travel in said grooves, substantially as described.

6. In a device of the class described, the combination of a continuously rotating driving member embodying a hub having a peripheral depression constituting a socket, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, the peripheral faces of the depressed portion being curved, a plate on the driving member above the depressed portion having faces curved to conform to the curvature of the peripheral faces of the depressed portion, the two faces forming guide channels to guide the driven member to bring the teeth into and out of the socket, substantially as described.

7. In a device of the class described, the combination of a continuously rotated driving member, comprising a hub portion having a peripheral socket therein, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, the driven member having a series of concave faces of a curvature conforming to the curvature of the periphery of the hub, the teeth of the driven member being arranged between said concave faces, and means for guiding the driven member to bring the teeth into and out of said socket, the concave faces of the driven member resting upon the periphery of the hub during the period of non-rotation of the driven member and locking the driven member against movement during such periods of non-rotation, substantially as described.

8. In a device of the class described, the combination of a continuously rotating driving member having a socket, an intermittently rotated driven member having a series of teeth adapted to successively enter said socket, and means for guiding said driven member in its movements to bring said teeth. into and out of said socket, substantially as described.

' ANDREW SGHUSTEK.

Witnesses:

WM. P. BOND, MARY R. FRosT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, .D. G. 

